package com.wl4837;

// 投影仪
public class Projector {
    public void on() {
        System.out.println("投影仪打开");
    }

    public void off() {
        System.out.println("投影仪关闭");
    }

    public void wideScreenMode() {
        System.out.println("投影仪设置为宽屏模式");
    }
}